arrays

Do objects pushed into an array in javascript deep or shallow copy?

邮差的信 提交于 2020-01-18 05:53:06
问题 Pretty self evident question...When using .push() on an array in javascript, is the object pushed into the array a pointer (shallow) or the actual object (deep) regardless of type. 回答1: It depends upon what you're pushing. Objects and arrays are pushed as a pointer to the original object . Built

Numpy array assignment with copy

北慕城南 提交于 2020-01-18 03:59:07
问题 For example, if we have a numpy array A , and we want a numpy array B with the same elements. What is the difference between the following (see below) methods? When is additional memory allocated, and when is it not? B = A B[:] = A (same as B[:]=A[:] ?) numpy.copy(B, A) 回答1: All three versions do

Numpy array assignment with copy

本小妞迷上赌 提交于 2020-01-18 03:58:25
问题 For example, if we have a numpy array A , and we want a numpy array B with the same elements. What is the difference between the following (see below) methods? When is additional memory allocated, and when is it not? B = A B[:] = A (same as B[:]=A[:] ?) numpy.copy(B, A) 回答1: All three versions do